Sewage disposal for public carriers



April 2, 1935.

G, F. COX

SEWAGE DISPOSAL FOR PUBLIC CARRIERS Filed Jan. 28, 1932 4 Sheets-Sheet 1Power dz'zze I N I "EN TOR.

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Mambo QM ATTORNEY v April 2, 1935. G. F. cox 1,996,325

SEWAGE DISPOSAL FOR PUBLIC CARRIERS Filed Jan. 28, 1932 4 Sheets-Sheet 2April 2, 1935.

G. F. COX

SEWAGE DISPOSAL FOR PUBLIC CARRIERS Filed Jan. 28, 1932 4 Sheets-Sheet 3ATTORNEY April 2, 1935. G. F. cox 1,996,325

SEWAGE DISPOSAL FOR PUBLIC CARRIERS Filed Jan. 28, 1932 4 Sheets-Sfieet4 I r I A IA'IIIIIIII INVENTOR. QWMAM g zu wm/w @oae,

LVJ-KC\\ M 7 ATTORNEY "ecZz'022 02951 Patented Apr. 2, 1935 UNITEDSTATES PATENT OFFICE 29 Claims.

This invention relates to the disposal of sewage and particularly tothat class of sewage which must be disposed of from passenger carryingvehicles, as for example, airplanes, busses and railway trains.

It has been and is now the custom to discharge excrement from airplaneand other public carrier toilets into the air. This causes thewidespread distribution of dangerous bacteria and the consequentendangering of the public health.

In the effective disposal of sewage from passenger carrying vehicles, itis not only essential that the disposal take place gradually so as todistribute the sewage over a comparatively large area but it is alsoessential that the sewage be, when discharged, both in relatively smallparticles and harmless from a bacteriological standpoint.

The primary object of this invention is the provision of an improvedmethod or and means for the disposal of sewage which will be adapted foruse in vehicles carrying persons.

Another object of the invention is the provision of such a method andmeans as will dispose of the sewage in small quantities.

A further object of the invention is the provision of such a method andmeans as will reduce the sewage to small particles before discharge.

A still further object of the invention is the provision of such amethod and means as will render the sewage bacteriologically harmlessbefore the same is discharged from the vehicle.

Another and still further object of the invention is the provision of ameans for agitating the sewage to assist in breaking it up into smallparticles and to permit it to be more readily and quickly sterilized.

Another and still further object of the invention is the retention ofthe sewage in a chamber, for a time after it has been thoroughly brokenup so that the sterilizing agent may be placed in more intimate contactwith the small particles throughout the entire mass and for a longertime.

Another and still further object of the invention is the provision formechanical stirring or agitating the sewage to more effectively andquickly break it up into small particles.

Another and still further object of the invention is the provision of arevolving means to break up the solid portions in the liquid to permitthe sterilizing agent within the fluid to come into more intimatecontact with the particles of matter to be sterilized.

Another and still further object of the invention is the provision foragitation of the sewage by means of gaseous means as by exhaust gas, air

pressure or steam, depending upon what agencies are at hand.

Another and still further object of the invention is the provision or agas steam or air jet to discharge its gaseous fluid on a tangent oi theinner 5 wall of an agitating chamber to cause the contents to revolvethereby assisting in the breaking-up process within the agitatingchamber.

Other and further objects will be apparent to those skilled in the artfrom a reading 01' the 10 complete specification and claims.

Referring to the drawings wherein I have illustrated embodiments of myinvention.

Figure 1 is a vertical cross section of a form of my invention whereinthere is a mechanical l5 agitation which is motor driven.

Figure 2 is a cross section on the line 2-4 of Figure 1.

Figure 3 is a cross section on the line 3-4 of Figure 1.

Figure 4 is a cross section on the line 4-4 01' Figure 1.

Figure 4 is a side view of the feeding mechanism for the screw feeder63, shown in Figure 4.

Figure 5 is an elevation of a drive mechanism 25 for the agitator usingthe relative air velocity of the vehicle to furnish the power through apropeller.

Figure 6 is a detail cross section oi the discharge fitting.

Figure '7 is a detail cross section of the discharge fitting when usedin connection with the exhaust pipe of an internal combustion motor.

Figure 8 is a modified form of the invention.

Figure 9 is a diagrammatic view shown mostly in section, illustrating amodified form of the invention using a gaseous fluid as a means forproducing agitation.

Figure 10 is a cross-sectional view on the line Iii-ll of Figure 9.

Figures 11 and 12 are vertical and horizontal views respectively of adetail of my invention.

Figure 13 is a cross section on the line l3-l3 of Figure 10.

Figure 14 is a cross sectional detail view of the connection to aninternal combustion engine exhaust.

Figures 15 and 16 are detail views of a device for operating an air jetas on airplanes. 50

Figure 17 is a vertical cross section of another modification using thepressure and exhaust created by the movement or a vehicle such as anairplane and also showing a gas sterilizing means.

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Figures 18 and 19 are cross sections on the lines Ill-l8 and Ill-i8,respectively of Figure 17.

Referring particularly to Figures 1 to 4, 28 designates the floor of atoilet compartment in a vehicle such as an airplane.

In carrying out my invention by the form illustrated in Figures 1 to 4,I have provided a main body member 2| having an agitation chamber 22 anda second chamber which is illustrated by the long passage 23. A narrowgateway or port 24 connects the chamber 22 with the chamber 23. Thewings or vanes 25 act to direct the sewage so that none of the sewagewhich has just been discharged from the chamber 22 can immediately bedischarged. At the opposite end of the chamber 23 from the port 24, is adischarge port 28 which has an overflow wall 21 at a proper height tocontrol the level of the sewage in the chamber 23 and to maintain thedesired height of overflow.

The body member 2| is provided at a suitable point, here shown as thebottom, with an opening under which is secured a motor 28 having adriving shaft 28 and a beater or agitating arm 38 mounted on the shaft.The main body 2| has its cover or top plate 2| which covers the chambers22, 23 and provides a support for the closet bowl to be described.

A closet bowl 3| is provided with a discharge neck 32 which extendsthrough a suitable opening in the cover 2| and as here illustrated at apoint over a place slightly oi! the center of the agitator arm 38.

The flange 33 is provided on the neck 32 to provide a support for thecloset bowl 38 and to provide a securing means to give rigidity betweenthe cover member 2| and the closet bowl 3|.

Suitable bolts 34 are provided to hold the flange 33 in place. It is tobe here noted that the lower edge of the neck 32 is at a lower levelthan the upper edge of the overflow wall 21. splashing of the liquid inthe neck 32, I preferably make an ofi-set in the neck as shown in Figure1.

The closet bowl 3| is provided with the usual seat 35 which may behinged as at 38. Around the rim 3'! of the bowl 3| is a passage 38having openings 38 for the delivery of liquid to the interior of thebowl 3|. A passage 39 acts as a feeder for the passage 38. In a suitablefitting 48 is a spring pressed valve 4| which is nonnally kept seated bythe spring 42. The fitting 48 is screw threaded in the lower end of adelivery means illustrated as the cylinder 43. Within the cylinder 43 isa piston 44 having an operating rod 45 passing through the cylinder head48. At the upper end of the rod 45 is a link 41, its upper end beingconnected to the operating lever 48. The fulcrum of the lever 48 is atthe pivot 48 which is secured in the upper end of the bracket '58 whichis integral with the head 45.

A suitable fitting 5| having a check valve 52 is provided in the lowerend of the cylinder 43. Secured to the fitting 5| is a control valve 53having a passage connecting the passage of the fitting 5|, its otherside being connected to a source of liquid (not shown).

The operating lever 48 has an extension 48' beyond its fulcrum and isalso provided with a counterbalance spring 54 which has its connectionat one end to the bracket 58. This spring 54 is of just sufficientstrength to lift the operating lever 48 and the piston 44, rod 45 andlink 41.

Illustrated diagrammatically for clearness is a To prevent switch forclosing the circuit to the motor 28. This switch comprises thestationary member 55 and the movable member 58. A suitable spring 51tends to normally keep the members 55 and 58 in contact. These members55 and 58 are in series with the electric connections to the currentsupply. It will be noted that the extension 48' of the operating lever48 is in position so that when the forward end of'the operating lever 48is raised, the extension 48' will engage the movable switch member 58and open the switch. This stops the motor.

The disposal of the discharge from the discharge port may be taken careof in any of many ways. It may be discharged directly into the open airas shown at 58 in Figure 4, or the discharge port 28 may deliver thesewage to the interior of the exhaust pipe as shown in Figure 7. Ineither case, the sewage by the time it passes the discharge port is inthe form of liquid containing small particles.

In Figure 7, I have shown the discharge fitting 58, passing through theside 59 of the airplane and into the exhaust pipe 88 of an internalcombustion motor.

As a substitute for the motor 28, the gear box 28 may be substitutedwith its connections to a'small propeller 8| on the outside of anairplane. In this case the relative air velocity drives the agitator. Inpractice, a suitable clutch with a control to the hand lever 48 may beprovided.

I will now describe the operation of my invention. After the closet bowlhas been used, the operating lever 48 is pushed downwardly to its limitof movement. This causes the check valve 52 to close and the valve 4| toopen against the action of the spring 42. The chamber of the cylinder 43which was full of a suitable liquid disinfecting chemical, empties itscontents through the passage 38, the passage 38, out of the openings 38and all along the sides of the bowl 3| and down into the neck 32 to thechamber 22.

But as the operating lever 48 is first moved, the switch 55, 58 isclosed, starting the motor 28. This causes the rotation of the agitatorand the consequent breaking up of the sewage into small particles withinthe sterilizing liquid. The centrifugal motion of the fluid caused bythe rotation of the agitator arm 38, would naturally have a tendency toimmediately force all of the fluid through the port 24 and thenceoutwardly through the chamber 23 and into the open. However, to offsetthis, I have so shaped the opening 24 relative to the direction ofrotation of the liquid being moved by the arm 38, that there will be ajetting tendency to draw the fluid back from the chamber 23. Thistendency with the centrifugal force of the rotating sewage offset eachother and produce an equilibrium. The proportion of the parts and thespeed and shape of the agitator should be such as to produce thisresult.

The motor continues to run and the agitating arm to revolve until theswitch 55, 58 is opened. The switch 55, 58 remains closed until theextension 48 causes it to open by the return of the arm 48 to itsoriginal and normally inoperative position.

As already stated the spring 54 is of just sufflcient strength to returnthe parts to normally inoperative position. The reservoir (not shown)for the disinfecting solution which is connected to the pipe leading tothe valve 53, would be so placed as to carry its liquid to the chamberwith- Wired Wore in the cylinder 43, but would usually be without agreat pressure. As the operating lever 40 and the piston 44 rise,the-disinfecting liquid refllls the chamber within the cylinder 43. Asthe lever 40 reaches its upper position, it opens the switch 55, and theparts are ready for another operation.

To control the time of refilling the chamber within the cylinder 43, thevalve 53 is adjusted to the correct position.

In case it is desired to use a dry sterilizing agent in the form ofpowder or crystals, I have provided a hopper 62 having a top 62' and ascrew conveyor 63 adjacent its bottom shown diagrammatically in Figure4.

A discharge opening 64 empties into the chamber 22, already descr Todrive the screw conveyor 633 on its shaft 65, I provide a pulley havinga flexible driving band 01 secured at one end to the pulley 66. Itsother end is attached to a rod 60 which in turn is attached to theoperating lever 40. The pulley i6 is mounted on the shaft 05 torelatively rotate in one direction. To bring about this result, I have aratchet 69 with dogs 10, as shown in Figure 4. The auxiliary pulley 66is provided with a small return chain 01' to return the pulley 06 andthe driving band 51 to its initial position. A spring 61" is provided tofurnish the motive power for this return movement.

When the operating handle 48 is pushed downwardly the flexible band 01is unwound from the pulley 60. By the coaction between the dogs 'I0.andthe ratchet 69, the shaft is turned and a desired amount of drysterilizing agent is fed from the opening 64 to the interior of thechamber 22. At the same time. the chain 61 was wound upon the drum 60*against the action of the spring 61''. Upon release of the operatinghandle 48, the spring 61 will turn the pulleys 06, 60' in acounter-clockwise direction as shown in Figure 4", to the initial ornormal position. During this latter movement, the shaft 65 does notturn, due to the lack of coaction between the ratchet 09 and the dogsI0.

If desired, a chlorine or other sterilizing gas supply may be had by apipe II through a valve box I2 whose valve is operated by the footplunger I3. In this case, the dry sterilizing agent may be omitted andwater may be used in the cylinder 43.

In Figure 8, I have illustrated a modification of my invention whereinthere is a continuous action.

Referring to Figure 8, I00 designates the seat of the usual closet bowlIOI. At the lower end of the bowl MI is a flange I02 to provide a meansfor securing the closet bowl to the flange I03 of the delivery pipe I04which connects to the main body I05 of the disposal unit.

The flanges I02, I03 are secured to the floor I06 of the plane. A strutI01 at the rear end of the main body I05, secures the disposal unit tothe outside of the plane fuselage.

Within the main body I05 is a revolving unit comprisirm a shaft I00 uponthe forward end of which is-a driving propeller I09 which revolves theshaft whenever the plane is in the air. To the rear of the propeller I00and within the main body portion I05 is a cylindrical body H0 mountedupon and to revolve with the shaft I08. This cylindrical body IIO has aconical portion 0' at its forward end at the lower end of the passageleading from the bowl IOI. 0n the outer surfaces of the cylindricalmember H0 and the conical portion Ill are small blades III which act asheaters to break up the solid portions of the sewage. These blades may,if desired, be placed slightly at an angle to the normal plane to theaxis of rotation, in order to the shaft I00 passes.

As the sewage is broken up and urged to the rear, it passes through thisopening I I8 and comes into contact with the beater prongs II4 which aremounted on the shaft I08. These latter tend to break the sewage intovery flne particles before discharge.

At the extreme rear of the main body member I85 is a discharge openingII5 which may be flaring in shape rearwardly in order to give a venturiaction to assist in drawing the sewage in small particles.

Extending from the side of the delivery pipe I04 is a supply pipe 0having a suitable flange III for connection to a suitable supply ofeither liquid or solid sterilizing agent.

In this modification, the shaft I88 turns continthe ground. The solidsand liquids passing down through the delivery pipe I04, come intocontact with the blades I II of the conical portion I I0 and thecylindrical member II 0. The solids are reduced by the blades III tosmall particles suspended in the liquid. This permits the sterilizingagent to come into intimate contact with the solid matter and eventuallyto render the whole sterile.

Under the action of the air pressure from the delivery pipe I04 causedby the suction action at the discharge opening 5 or by the screw actionof the blades or both, the mass is urged rearwardly through the openingH8.

The beater prongs II4 act upon and continue to break up the solids intoflner particles as they pass toward the discharge opening Hi. Whenfurther deposits are made through the delivery pipe I04 and pass to therear, any sewage still in the chamber rearward of the opening 3 Will beforced outwardly through the opening II5. As the swift currents of aircatch the discharged sewage, it will be broken up into finer particles.When the sewage reaches the air, the drying action of the air begins andunder normal conditions, there will be nothing but sterile dust to bedeposited on the ground.

If desired to have the shaft I00 operable at will, suitable clutch meansmay be provided. As these are common in the arts, it is not thought tobe necessary to illustrate this feature.

In Figures 9 to 14. I have illustrated another embodiment of myinvention wherein I use a gas to provide the means for agitating thesewage.

The numeral 2 designates the floor of the vehicle where the installationis set up. I provide a base or main body member 202 which contains theagitating chamber 208. About the sides of the chamber 203 and adjacentthe bottom thereof, are ribs 204 which protrude far enough to assist inthe breaking-up action but do not extend out far enough to materiallyaflect the circular movement of the liquid mass as will be de- 202 issubstantially cylindrical in shape and is provided with a wide A closetbowl member 206 is provided with a flange 201 corresponding in shape tothe adiacent surface of the flange 205 and is secured thereto bysuitable bolts. The bowl or closet member 206 is provided with a neckportion 200 which extends down into the body member 202 and terminatesnear the bottom. 1

Near its opening, it is provided in its inner rim with notches 299 whichassist in the initial step of the breaking-up process.

Referring particularly to Figures and 13, a boss 2l0 is provided on theinner surface of the body member 202. This boss 2|0 has a passage 2 inthe form of a jet, the port of which is adjacent the periphery of thebottom of the chamber 203, and is so placed as to point along thetangent of the cylindrical chamber. A pipe 2|2 is connected to thepassage 2 and extends from a suitable valve box 2|3 illustrated onFigure 9. This valve box 2|3 is connected from the source of gaspressure by a pipe 2 which may be the exhaust connection of an internalcombustion engine, a steam pipe or any other source of gas or airpressure.

The valve box 2|3 has a suitable valve and valve seat therein to controlthe passage of gas or air therethrough.

Connected to the upper portion of the'body member 202 is an outlet 2|5which is the lead-ofi from the chamber 203. The opening of the outlet2|5 may lead to the pipe 2|6 and to the open air as illustrated or tothe exhaust pipe 2|! as illustrated in Figure 14. A flanged fitting 2|0connects the pipe 2|6 to the exhaust pipe 2|l or conducts the sewageinto the open air.

If desired to retain the sewage intact for a time to permit thesterilizing agent to act for a longer period of time before beingdischarged, a long passage may be provided through which the sewage willpass. A box 2|9 may be provided with intake and outlet flangedconnections similar to those of the pipe 2|6.

A vertical cross section of such a box is illustrated in Figure 11 and ahorizontal cross section of the same is shown in Figure 12. This box ispreferably provided with one or more partitions 220. These partitionsmay be made detachable to slide in place between the lugs 22| which areintegral with the box sides. The partitions may be made identical andare provided with openings 220. By sliding the partitions into place ininverse alternate positions, a circuitous route for the sewage isprovided. As illustrated, the openings 220' are so placed as to give themovement of the sewage, as it progresses through the box, an alternateside to side movement. The openings may be arranged in any other mannerto give the sewage the desired course. The circuitous route for thesewage. prevents the immediate discharge of those portions of the sewagewhich have just been admitted to the box 2|9. If it is not desired todischarge all of the solid matter, the box 2|9 can be made large enoughto collect some of the solid matter, the box being serviced at the endof a run."

After passing out of the box and through the tting 2|0, the sewage maybe discharged into the open air or into the exhaust pipe 2" to bedischarged, as already described. A suitable cover 2|3 for the box 2|9is provided and may be held in place by screws.

To provide for the admission of the sterilizing agent, the upper edge ofthe bowl 206 is provided with a passage 222 within the rim as shown inFigure 9. This passage has outlet holes into the bowl which I havedesignated 223.

The passage 222 has an inlet from a. valve 224 which is connected at oneside to the duct of the pipe 225. This duct 225 leads from a suitablefitting 226 containing a valve seat and valve 221, which valve isnormally held seated by the spring 228.

The fitting 226 is screw threaded into the lower end of the cylinder 229in which operates the piston 230. The piston rod 23| is connected to alink 232 which in turn is connected to one arm of a bell-crank lever233. Another arm of the bell-crank lever 233, is connected'to a link234. This link 234 operates the valve in the valve box 2|3 alreadydescribed. A spring 235, normally holds the bell-crank lever 233 in theposition as illustrated in Figure 9. A handle operating arm 236 is anintegral part of the bell-crank lever 233 and is used to cause theoperation of the whole device as will be described. A fitting 231 isplaced in the bottom of the cylinder 229 and is screw-threaded in itsplace. is provided with a small light check valve 238 which prevents anymovement of the sterilizing fluid from the chamber 239 of the cylinder229 into the pipe 240. This pipe 240 leads to a suitable storage tank(not shown) for the storage of the liquid sterilizing agent supply.

At the top of the cylinder 229, I provide a cylinder head 24| which issecured in place with suitable bolts, In the head 24| is a check valve242 which is normally held seated by the spring 243. This valve 242 isgently held to its valve seat in the head 2 by the spring 243 so thatwhen the piston 23| is moved away from the head, the valve 242 willimmediately open to admit air but will close as soon as the piston 230stops its downward movement and will remain closed during its upwardmovement.

To control the movement of the air from the space above the piston 230,there is placed in the side of the cylinder 229, a pet-cock 244. Byturning this pet-cock 244 on or off, the time of movement of the piston230 from its lower position to its upper or ready-for-operation positioncan be controlled.

I will now describe the operation of the modification illustratedparticularly in Figures 9 to 14.

After use of the toilet, the handle arm 236 of the bell-crank lever 233is moved in a clockwise direction as illustrated in Figure 9,--as far asit will go. As the first movement takes place, the fluid within thechamber 239, immediately closes the check valve 238 and pushes the valve221 against the action of the spring 228, to permit the liquid to passinto the duct of the pipe 225. The liquid passes through the passage ofthe valve 224 out into the passage 222 of the rim of the closet bowl206. The fluid passes out of the holes 223 into the bottom or neck 208.

As soon as the movement of the piston 230 is brought about by themovement of the handle arm 236, the valve 242 opens to destroy anytendency of the piston 230 to form a vacuum thereabove which permitsfree downward movement of the piston 230.

The movement of the handle arm 236 also, through the link 234, opens thevalve within the valve box 2|3 and permits the gas or air pressure toenter the jet 2| I. When this gas or air emerges from the jet openinginto the liquid of the agitating chamber 203, a movementcircumferentially oi the chamber is set up. As the centrifugal forcesoperate on the fluid, the latter This fitting 231 ribs 204 will becontacted WMW WMW 1,996,895 the outer surface of the will rise on thesiderof cylinder 202 and a corresponding lowering of the level of theliquid in the neck 203 will result.

Any solid matter in the neck 203 will be drawn into the agitatingchamber 203 and at the same time this circular movement will be impartedfrom the agitating chamber fluid to the fluid within the neck 203 of thebowl 201. As the solid matter reaches the notches 203, the breaking-upaction begins to take place. The solid matter then passes to the chamber203 and as the velocity of the moving fluid increases, more surface ofthe chamber 202 will be covered. The

and further breakingup of the solids will take place. As the solids arebroken up, the small particles come into intimate contact with thesterilizing agent and the sterilizing action is assisted.

When exhaust gases from an internal combustion motor are used or wheresteam is used, it will be noted that a corresponding heating action willtake place. This makes it powble to use a sterilizing fluid of lowerconcentrate, as the heat assists the action of the sterilizing agent. Infact the sterilizing action could be brought about by the steam or hotgas alone if continued long enough.

When the liquid contents of the chamber 203 rises along the surface ofthe inner wall of the cylindrical body member 202 it will come to theoutlet M0 and pass to the pipe 2" or the box 2l9 as the case may be. Ifthe box 2l3 is used, the liquids therein are forced through the box asindicated by the arrows. After passing through the pipe 210 or the box2, the sewage passes through the fltting 2" either to the open air orinto the exhaust pipe of the internal combustiqn motor. In the lattercase, the heat would have a tendency to disintegrate and sterilize theparticles and evaporates the water.

As soon as the handle arm 230 is released by the operator, the spring233 tends to return it to its initial position ready for anotheroperation. When the return movement begins, the valve 221 is closed byits spring 223 and the valve 230 is opened. The valve 242 is also closedby the spring 243. The upward movement of the piston 230 tends tocompress the air above the piston and a retarding of the movement of thepiston results. The escape of the air takes place through the pet-cock244, which latter may be adjusted to control the movement.

During the upward movement of the piston 230, the chamber 233 is fillingwith the sterilizing fluid from the pipe 240.

When the handle arm 230 reaches its left position as shown in Figure 9,the rod 234 closes the valve within the valve box 2" and the flow ofgas, steam or air is stop The fluid level within the chamber 203 and theneck 203, becomes the same. The parts are now in position for furtheruse and operation.

During operation excess gas or steam or air pressure is prevented by thepassage of the gases over the top of the fluid through the box 2l3 outand to the open air along the same course above described for thesewage.

As the sewage is discharged from the fltting 2l0, it will be blown intosmall particles by the relative wind velocity if being used on anairplane. The particles will, before they come to the earth, bythoroughly sterile. It would be pref erable to use a sterilizing agentthat would quickly become inert when discharged into the atmosphere.

An example of this is caustic soda which when in contact with the airwould quickly carbonate. If a sterilizing agent is used which is harmfulo the skin, there should be provision for preventing splashing of theliquid. The offset of the neck 200 will produce the desired result.

If any small particles should come into contact with the ground beforeseparating, they will previously have become sterile and can cause noharm. This latter might be the case where the invention might be used ona bus without having the discharge go into the exhaust pipe. In case thedischarge is made to the exhaust, the sterilizing action will beassisted and the particles will be mixed with the exhaust gases.

If it is desired to use the jet agitator with air pressure as forexample on an airplane, the funnel 240 shown in Figures 15 and 16 may beplaced so that its mouth is exposed to the direct action of the air, thefunnel being connected to the tube 2 which is connected to the valve box2".

If a chemical should be used as a sterilizing agent which it wasbelieved might injure the skin and it was found that to pass the agentthrough the duct 222 would be in danger of contact with the skin, theagent could be made to enter the system without passing it through therim of the bowl. To provide such entry, I furnish a duct connection 250from the valve 224 and extending to the opening 25I in the flange 2 l.

The valve 224 is so constructed that it may cut oil! the connection tothe passage 222 and open a direct passage from the pipe 225 to the ductconnection 200.

If found to be desirable, the sterilizing agent may be introduced in thesolid form in any suitable manner as for example as described earlierfor the structure illustrated in Figure 4.

It is also possible to introduce a gaseous sterilizing agent such aschlorine. A connection for this purpose is illustrated at 253 which isshown as entering the valve box 2l3. A suitable valve controlled by thevalve operating rod 234 admits the chlorine at the same time the gassteam or air is admitted to the tube 2 l2 from the tube 2 H. Thechlorine or other gaseous sterilizing agent would in this arrangemententer the chamber 203 through the duct 2 and would be absorbed by theliquid in the chamber 203.

In Figures 17, 18 and 19, I have illustrated still another form of myinvention which it is believed preferable to keep in operation at alltimes when the airplane or other fast moving vehicle is in motion.

A closet bowl 300 with the seat 30l may be of the usual or any suitabletype. The disposal unit as here illustrated is located in the spacebelow the plane in the wind.

The delivery pipe 302 is suitably flanged and is secured to the closetbowl in any suitable or well known manner. At the lower end of thedelivery pipe 302 is the main body portion 303, into which the depositsare made.

A duct 304 is provided on the side of the delivery pipe 302 for thepurpose of delivering a liquid or solid sterilizing agent to the chamber300 of the main body portion 303. To provide for the agitation of theliquid and solids, I have provided a wind collecting funnel 306 havingan opening on the tangent of the bottom of the periphery of the mainbody portion 303, which latter is preferably substantially cylindrical.This opening I have designated 301. Air collected by the funnel 303 isdelivered to the liquid within the chamber 300. The liquid is caused torevolve rapidly. This action breaks up the solid matter into smallparticles.

In order to get rid of the air thus forced in, I have provided an outlet300 larger in area than the inlet 301. To assist in exhausting the airfrom the interior of the chamber 305, I provide a funnel 300 in thereverse position from the collecting funnel 306 and having a largermouth. If a very strong suction action is desired at the outlet 300 thiseffect may be gained by connecting the outlet 303 to an aspirator nozzleoperated by another wind collecting funnel of the same diameter orlarger diameter than the funnel 308.

During the operation of the device which is continuous, whenever theliquid is raised by centrifugal action or by the receipt of additionaldeposits, some of the contents will be forced out of the opening 303 anddischarged into the open air.

If desired, the main body portion 303 may be between the floor of thecompartment and the bottom of the fuselage of a plane. In such a casethe funnels would be placed outside to collect and discharge the air,the tubes being led from the respective funnels to the openings 301 and308. It will be noted that since the throat of the funnel 306 is as highas the opening 300, there will be no undesirable discharge of thecontents of the chamber 303 when the vehicle is not in motion.

If desired, a gaseous sterilizing agent as chlorine may be applied tothe liquid by a pipe 3l0 and controlled by a valve knob 3| i. In thecase of the use with chlorine or other gaseous sterilizing agent, itmight be found to be desirable to use only water through the passage304. Or it might be found that it could be operated without insertingany water during a run" or series of runs.

In using any of the forms of my invention, it is possible to usesuitableclosets now on the market making the changes necessary to havethem properly secured together and in proper relation.

While I have illustrated and described in detail embodiments of myinvention, I desire to have it understood that these descriptions andshowings are merely illustrative and that parts may be interchanged inthe several forms and that modifications and other changes may be madewithout departing from the spirit of the invention and within the scopeof the appended claims.

Having described my invention, what I claim and desire to secure byLetters Patent is- 1. The method of sewage disposal for public carrierswhich consists in agitating the sewage in the presence of a sterilizingagent, then permitting it to enter and slowly pass through a long narrowpassage and then discharging the same at the opposite end of thepassage.

2. The method of sewage disposal for public carriers which consists inagitating the sewage in the presence of a sterilizing agent, thenpermitting it to enter and slowly pass through a long narrow passage anddischarging the same in small quantities at the opposite end of thepassage.

3. The method of sewage disposal for public carriers which consists inagitating the sewage in the presence of a sterilizing agent, thenpermitting it to enter and slowly pass through a long narrow passagethen permitting the mixture to be retained for a time to permit thesterilizing agent to act and then discharging the same at the oppositeend of the passage.

4. The method of sewage disposal for public carriers which consists inagitating the sewage, then permitting it to enter a long narrow passage,then permitting it to remain at rest in the presence of a sterilizingagent and then discharging the same atthe opposite end of the passage.

5. The method of sewage disposal for public carriers which consists inagitating the sewage, then permitting it to enter a long narrow passage,then permitting it to remain in the presence of a sterilizing agent andthen discharging the same in small quantities atthe opposite end of thepassage.

6. The method of sewage disposal for public carriers which consists inagitating the sewage and heating it at the same time then causing it toenter a long narrow passage and then discharging it at the opposite endof the passage.

7. The method of sewage disposal for public carriers which consists inheating and agitating the sewage at the same time, then passing it intoa long, narrow retaining chamber and then discharging it.

8. The method of sewage disposal for public carriers which consists inheating and agitating the sewage at the same time, then passing it intoa long, narrow retaining chamber, then discharging it into the exhaustpipe of an internal combustion motor.

- 9. The method of sewage disposal which consists in agitating thesewage in the presence of a sterilizing agent by passing a gas into themass and then discharging the same.

10. The method of sewage disposal which consists in agitating the sewageby passing a hot gas into the sewage and along one wall of thecontainer, and then discharging the same.

11. The method of sewage disposal which consists in agitating the sewageby passing the exhaust gases of an internal combustion motor into thesewage in the sewage container and then discharging the same into aretainer and then discharging the same from the container.

12. The method of sewage disposal which consists in agitating the sewagein the presence of a sterilizing agent by causing a hot gaseous flowinto and below the surface of the sewage and then discharging thesewage.

13. A sewage disposal apparatus for public carriers comprising anagitator chamber to receive the excrement, means for causing thecontents of the chamber to be agitated and a long. narrow conduit havingan inlet and an outlet for conducting the sewage to the open air, theinlet and outlet being relatively placed to retain the sewage within thepassage until other sewage entering causes it to be discharged.

14. A sewage disposal apparatus for public carriers comprising anagitator chamber to receive the excrement, a passage for delivering asterilizing agent to the bowl, means for causing the contents of thechamber to be agitated and a long, narrow conduit having an inlet and anoutlet for conducting the sewage to the open air, the inlet and outletbeing relatively placed to retain the sewage within the passage untilother sewage entering causes it to be discharged.

15. A sewage disposal apparatus for public carriers comprising a chamberto receive the ex crement, a mechanical agitating device for breaking upthe excrement into small particles and a long, narrow conduit having aninlet and an outlet for delivering the sewage into the open air, theinlet and outlet being relatively placed to retain the sewage within thepassage until other sewage entering causes it .to be discharged.

16. A sewage disposal apparatus for public carriers comprising a chamberto receive the excrement, a mechanical agitating device for breaking upthe excrement into small particles, an elongated chamber adjacent thereceiving chamber to receive the sewage at one end and a pas sage fromthe opposite end of the elongated chamber to the open air.

17. A sewage disposal apparatus for public carriers comprising a bowl, achamber below the bowl to receive the excrement, a jet connection to thechamber below the sewage level, a source of gaseous fluid supplyconnected to the jet connection and a passage from the chamber to theopen air.

18. A sewage disposal apparatus for public carriers comprising a chamberto receive the excrement, a jet connection to the chamber below thesewage level, a conduit for connecting the jet to the hot exhaust gasesfrom an internal combustion motor and a passage leading from thereceiving chamber to the open air.

19. A toilet for public carriers comprising a toilet bowl, a chamber toreceive the excrement, a jet connection to the chamber below the sewagelevel. a conduit'for connecting the jet to a source of hot gaseousfluid, a relatively long retaining chamber, a connection to deliver thesewage from the receiving chamber to the retaining chamber and a passagefrom the retaining chamber to the open air.

20. The process of sewage disposal from public carriers which consistsin passing the sewage in the presence of a disinfecting agent through anagitation-retention chamber by hydraulic displacement and thendischarging it to the atmosphere in an unnoisome and bacteriologicallyharmless condition.

21. The process of sewage disposal from public carriers which consistsin passing the sewage in the presence of a disinfecting agent through anagitation chamber and then through a retention chamber by hydraulicdisplacement and then discharging it to the atmosphere in an unnoisomeand bacteriologically harmless condition.

22. The process of producingfrom the sewage of public carriers abacteriologically harmless unnoisome discharge which consists in passingthe sewage through an agitation-retention chamber in the presence of adisinfecting agent in a manner which allows the retention of the treatedmaterial until bacteriologically harmless and which permits no mixing ofuntreated material with the treated material, and then discharging intothe atmosphere.

23. The process of producing from the sewage of public carriers abacteriologically harmless unnoisome discharge which consists in passingthe sewage through an agitation chamber in the presence of adisinfecting agent and then through a retention chamber in a mannerwhich allows the retention of the treated material until bacteriologically harmless and which permits no mixing of untreatedmaterial with the treated material, and then discharging into theatmosphere.

24..Ihe process of producing from the sewage of public carriers abacteriologically harmless ing the material until bacteriologicallyharmless in a manner which permits no mixing of untreated material withtreated material and then discharging into the atmosphere.

25. The process of producing from the sewage of public carriers abacteriologically harmless unnoisome discharge which consists insubjecting the sewage to gas flow agitation in the presence of adisinfecting agent and then retaining the material untilbacteriologically harmless in a, manner which permits no mixing ofuntreated material with treated material and then discharging into theatmosphere.

26. The process of sewage disposal from public carriers which consistsin passing the sewage in the presence of a disinfecting agent through anagitatiomretention chamber by hydraulic displacement and thendischarging it by aspiration in an unnoisome and bacteriologicallyharmless condition.

27. The process of sewage disposal from public chamber by hydraulicdisplacement and then to the atmosphere in an unnoisome andbacteriologically harmless condition.

28. The process of producing from the sewage of public carriers abacteriologically harmless, unnoisome discharge which consists inpassing the sewage throughan agitation-retention chamber in the presenceof a disinfecting agent in a manner which allows the retention of thematerial undergoing treatment for the desired time and which permits nomixing of untreated material with material undergoing treatment and thendischarging by aspiration to the atmosphere.

29. The process of producing from the sewage of public carriers abacteriologically harmless unnoisome discharge which consists in passingthe sewage through an agitation chamber in the presence of adisinfecting agent and then through a retention chamber in a mannerwhich allows the retention of the material undergoing treatment for thedesired time and which permits no mixing of untreated material withmaterial undergoing treatment and then discharging by aspiration to theatmosphere.

GENEVIEVE FREEMAN COX.

